File size limits in Express - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the file size limit to 1MB using express.json().

Express

app.use(express.json({ limit: '[1]' }));

Drag options to blanks, or click blank then click option'

A1mb

B1024kb

C1000kb

D1MB

Attempts:

3 left

💡 Hint

Common Mistakes

Using '1024kb' (option B).

Using '1MB' (option D).

The correct way to specify 1 megabyte is '1mb' which equals 1MB in express.json() limit option.

2fill in blank

medium

Complete the code to limit file uploads to 5MB using multer.

Express

const upload = multer({ limits: { fileSize: [1] } });

Drag options to blanks, or click blank then click option'

A5000000

B5 * 1024 * 1024

C5242880

D5e6

Attempts:

3 left

💡 Hint

Common Mistakes

Using string values instead of number bytes.

Using 5e6 which is close but not exact 5MB in bytes.

Multer expects fileSize limit in bytes. 5MB equals 5242880 bytes (5 * 1024 * 1024).

3fill in blank

hard

Fix the error in setting the file size limit for express.urlencoded().

Express

app.use(express.urlencoded({ extended: true, limit: '[1]' }));

Drag options to blanks, or click blank then click option'

A1024kb

B1MB

C1000000

D1mb

Attempts:

3 left

💡 Hint

Common Mistakes

Using numeric values instead of string with units.

Using lowercase 'mb' (option D).

The limit option expects a string with size and unit, '1024kb' correctly sets 1MB limit.

4fill in blank

hard

Fill both blanks to set multer to accept files up to 2MB and only single file named 'avatar'.

Express

const upload = multer({ limits: { fileSize: [1] } });
app.post('/profile', upload.[2]('avatar'), (req, res) => { res.send('Uploaded'); });

Drag options to blanks, or click blank then click option'

A2097152

Bsingle

C2MB

Darray

Attempts:

3 left

💡 Hint

Common Mistakes

Using '2MB' string instead of bytes number.

Using upload.array() instead of upload.single() for single file.

File size limit is 2MB in bytes (2097152). To accept one file named 'avatar', use upload.single('avatar').

5fill in blank

hard

Fill all three blanks to create an express.json() middleware with 10MB limit, and multer to accept multiple files named 'photos' with 3 files max.

Express

app.use(express.json({ limit: '[1]' }));
const upload = multer({ limits: { fileSize: [2] } });
app.post('/upload', upload.[3]('photos', 3), (req, res) => { res.send('Files uploaded'); });

Drag options to blanks, or click blank then click option'

A10mb

B10485760

Carray

Dsingle

Attempts:

3 left

💡 Hint

Common Mistakes

Using '10MB' uppercase.

Using upload.single() instead of upload.array() for multiple files.

express.json() limit is '10mb' string. Multer fileSize limit is 10MB in bytes (10485760). To accept multiple files named 'photos' max 3, use upload.array('photos', 3).